Red/orange dual-emissive carbon dots for pH sensing and cell imaging
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The dual-emissive N, S co-doped carbon dots (N, S-CDs) with a long emission wavelength were synthesized via solvothermal method. The N, S-CDs possess relatively high photoluminescence (PL) quantum yield (QY) (35.7%) towards near-infrared fluorescent peak up to 648 nm. With the advanced characterization techniques including X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), etc. It is found that the doped N, S elements play an important role in the formation of high QY CDs. The N, S-CDs exist distinct pH-sensitive feature with reversible fluorescence in a good linear relationship with pH values in the range of 1.0–13.0. What is more, N, S-CDs can be used as an ultrasensitive Ag+ probe sensor with the resolution up to 0.4 μM. This finding will expand the application of as prepared N, S-CDs in sensing and environmental fields.
Keywordscarbon cell imaging dual-emissive photoluminescence pH-sensitive Ag+ probe
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We thank Beijing Nova Program Interdisciplinary Studies Cooperative Project (No. Z181100006218138), Science Foundation of China University of Petroleum-Beijing (No. 2462018BJC004), National Key Specialty Construction Project of Clinical Pharmacy (No. 30305030698) and Research Funding of Sichuan Provincial People’s Hospital (No. 2017LY08) for the support.
- Chen, Y. H.; Zheng, M. T.; Xiao, Y.; Dong, H. W.; Zhang, H. R.; Zhuang, J. L.; Hu, H.; Lei, B. F.; Liu, Y. L. A self-quenching-resistant carbon-dot powder with tunable solid-state fluorescence and construction of dualfluorescence morphologies for white light-emission. Adv. Mater. 2016, 28, 312–318.CrossRefGoogle Scholar
- Xu, Q.; Li, B. F.; Ye, Y. C.; Cai, W.; Li, W. J.; Yang C. Y.; Chen, Y. S.; Xu, M.; Li, N.; Zheng, X. S. et al. Synthesis, mechanical investigation, and application of nitrogen and phosphorus co-doped carbon dots with a high photoluminescent quantum yield. Nano Res. 2018, 11, 3691–3701.CrossRefGoogle Scholar
- Chen, Y. H.; Zheng, M. T.; Xiao, Y.; Dong, H. W.; Zhang, H. R.; Zhuang, J. L.; Hu, H.; Lei, B. F.; Liu, Y. I. A self-quenching-resistant carbon-dot powder with tunable solid-state fluorescence and construction of dualfluorescence morphologies for white light-emission. Adv. Mater. 2016, 28, 312–318.CrossRefGoogle Scholar